CVE-2023-42657

Name: CVE-2023-42657
Creator: NVD / NIST
Published: 2023-09-27T15:19:32.983+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.6/10EPSS 17.03%

Last modified Jun 17, 2026

CVE-2023-42657 is a critical-severity vulnerability rated 9.6/10 on the CVSS scale. In WS_FTP Server versions prior to 8.7.4 and 8.8.2, a directory traversal vulnerability was discovered. An attacker could leverage this vulnerability to perform file operations (delete, rename, rmdir, mkdir) on files and folders outside of their authorized WS_FTP folder path. Attackers could also escape the context of the WS_FTP Server file structure and perform the same level of operations (delete, rename, rmdir, mkdir) on file and folder locations on the underlying operating system. . EPSS estimates a 17.03% chance of exploitation in the next 30 days.

Description

In WS_FTP Server versions prior to 8.7.4 and 8.8.2, a directory traversal vulnerability was discovered. An attacker could leverage this vulnerability to perform file operations (delete, rename, rmdir, mkdir) on files and folders outside of their authorized WS_FTP folder path. Attackers could also escape the context of the WS_FTP Server file structure and perform the same level of operations (delete, rename, rmdir, mkdir) on file and folder locations on the underlying operating system.

Metrics

CVSS 3.1

9.6/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:H

EPSS Probability

17.03%

96.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Progress	Ws Ftp Server	< 8.7.4
Progress	Ws Ftp Server	>= 8.8.0, < 8.8.2

References

https://community.progress.com/s/article/WS-FTP-Server-Critical-Vulnerability-September-2023Vendor Advisory
https://www.progress.com/ws_ftpProduct
https://community.progress.com/s/article/WS-FTP-Server-Critical-Vulnerability-September-2023Vendor Advisory
https://www.progress.com/ws_ftpProduct

Timeline

Published: Sep 27, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-42657?

How severe is CVE-2023-42657?

CVE-2023-42657 has a CVSS score of 9.6/10 (CRITICAL severity). The EPSS model estimates a 17.03% probability of exploitation in the next 30 days.

How do I fix CVE-2023-42657?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-42657?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST